"C'mon mom! Let's go!" Nine year old James said eagerly as he tugged on his moms arm, looking up at the glowing sign for the pet store, he'd been waiting for this day for weeks! They were finally getting a dog!
His mom smiled and laughed as they entered the store, "Alright, alright, lets see what they have."
Once at the back of the store, James and his mom looked at all the puppies for sale, they had beagles, pugs, Herman shepherds, Saint Bernards, all kinds of dogs he'd never heard of, and a few mutts too. Feeling particularly good about the beagles, James was looking at them as his mom asked one of the employees about playing a bit with one of the beagle puppies before purchase. And then Jeff pressed 'Enter' on the chronivac and reversed the positions of dogs and humans.
James was too busy watching the puppies to notice that anything had changed, but when he turned around, everybody was naked! "Mom, where are your clothes?" He asked, but before she could respond, he noticed that he was naked too, but then, why was he asking where their clothes were again?
Before he could process the next several changes, he found himself in a pen with his mom, their physiology altered as before, and looking at a family of beagles who were contemplating getting a pet human. This made James happy, he shook his butt in happiness and nuzzled his mom, who licked him with a resigned look on her face, she knew he was big enough to leave her, he'd been weaned off her milk and soon he would get a nice family.
"Lookit this one momma!" A beagle girl in a pink sundress said, pointing at James, "He's gotta tiny peepee!"
James didn't know what they were talking about, but bounded up to the bars and panted happily, waging his butt excitedly, yipping to keep their attention.
The beagle girls sister walked up, "Hie peepee is wagging!" She laughed as James' hairless penis swayed from his butt wagging.
"Can we play with this one momma?" The first one asked their mom as she signed papers with a bored looking Saint Bernard clerk.
At the nod of the clerk, the mom nodded, prompting a cherr as James was led out to one of the pens to play with.
After a few minutes, James was on a leash happily following the beagle daughters home, he'd been renamed "Bolt" by the girls, and as they left, Bolt, formerly James, looked back and saw his mom getting mounted by a male human, to replace James now that he'd been sold.
That was the last he'd ever see her